Antique Armstrong DP-1 Clear Glass Insulator — Drip Point — Made in USA

An antique Armstrong DP-1 clear glass insulator with crisp maker embossing and a well-defined drip-point profile.

• Manufacturer: Armstrong Glass Company
• Model: DP-1
• Origin: Made in U.S.A.
• Era: Early 1900s
• Material: Clear glass
• Height: Approximately 3.5 in.
• Glass character: Minor manufacturing bubbles and striations visible
• Condition: No chips or cracks noted; please review all photographs for embossing, surface wear, and manufacturing character

A clean American utility-glass example for a telegraph, telephone, industrial, or insulator collection.